我女儿的题目

prove that there is no application f N-->N, so that

f(f(n)) = n + 2011

所有跟帖： 

• Is this the correct question? -Pantsonfire- ♀ (34 bytes) () 05/28/2011 postreply 20:22:45

• N-->N, from natural to natural -15少- ♂ (0 bytes) () 05/29/2011 postreply 01:24:18

• Dom't worry,next year the question being changed to f(f(x))=n+ 2 -jinjing- ♀ (226 bytes) () 05/29/2011 postreply 08:57:40

• no such relation neither -15少- ♂ (0 bytes) () 05/31/2011 postreply 15:56:33

• Can you give the proof? If you can't show , and then I contruct -jinjing- ♀ (0 bytes) () 05/31/2011 postreply 18:10:49

• c -15少- ♂ (681 bytes) () 06/01/2011 postreply 03:34:14

• What is relation? your 1 to 6 is just my proof. my 2011/2 out of -jinjing- ♀ (255 bytes) () 06/01/2011 postreply 06:51:04

• 回复：What is relation? your 1 to 6 is just my proof. my 2011/2 out -15少- ♂ (133 bytes) () 06/01/2011 postreply 08:31:32

• your (2) means f is bijection function. 1 to 1 and onto. -jinjing- ♀ (78 bytes) () 06/01/2011 postreply 09:03:44

• 回复：your (2) means f is bijection function. 1 to 1 and onto. -15少- ♂ (47 bytes) () 06/01/2011 postreply 09:19:59

• If f is linear, OK. But we can't say nonlinear f is impossible b -jinjing- ♀ (45 bytes) () 06/01/2011 postreply 11:41:54

• you said yourself "for any f, no solution" -15少- ♂ (41 bytes) () 06/01/2011 postreply 13:14:55

• 回复：you said yourself "for any f, no solution" -jinjing- ♀ (55 bytes) () 06/01/2011 postreply 14:28:17

• is there anything wrong in my demonstration 1) to 6)? -15少- ♂ (0 bytes) () 06/01/2011 postreply 15:06:40

• your answer is not math answer, I do this Q, I hope you can see. -jinjing- ♀ (191 bytes) () 06/02/2011 postreply 10:07:19

• MY answer is MY math answer. -15少- ♂ (299 bytes) () 06/02/2011 postreply 12:41:02

• I like the people who like Math. Let me tell you the detail. -jinjing- ♀ (177 bytes) () 06/02/2011 postreply 15:51:05

• 回复：I like math, not myth nor mystification -15少- ♂ (266 bytes) () 06/02/2011 postreply 17:24:06

• You at first you don't think f(N1)=N2,so,I ,,,,your deduce prove -jinjing- ♀ (164 bytes) () 06/02/2011 postreply 18:23:04

• Nice! -乱弹- ♂ (0 bytes) () 06/01/2011 postreply 18:40:26

• thanks! -15少- ♂ (0 bytes) () 06/02/2011 postreply 12:46:16

• 回复：c Could you provide some details for -wxcfan123- ♂ (247 bytes) () 06/11/2011 postreply 18:57:48

• figure out missing details. Nice problem and nice solution. -wxcfan123- ♂ (335 bytes) () 06/12/2011 postreply 14:36:53

• 回复：我女儿的题目 -letmeregister- ♂ (555 bytes) () 06/04/2011 postreply 20:46:08

• 回复：我女儿的题目 -alladin- ♂ (883 bytes) () 07/08/2011 postreply 23:34:44